Composition of matter



Patented Nov. 29, 1932 UNITED STATES PATENT'fo-FFICE;

MARC DARRIN, or PITTSBURGH, rnNNsYLvAnI AssIGNoR To in. BUn ooMr nY, LIMITED, or TORONTO, ONTARIO, CANADA, A CORPORATION OF onT mo, CANADA,

COMPOSITION or MATTER No Drawing.

This invention relates .to a composition of matter. r I v It is an object ofthis invention to provide a composition of matter and articles made from the same which will be strong, durable and rigid and resistant.

In my copending application Serial #415,- 819, filed December 21, 1929 forthe reissue of Patent $51,644,711, reissued November 11, 1930, Serial No. 17,867, the fact is disclosed that sulphur maybe caused to penetrate into the pores of paper and paper pulp bythe they possess the desirable property of rendering the product fireproof.

In accordance with this invention it has been disclosed, particularly where chlorodiphenyl is used as an introfier, that very desirable products can be obtained by the impregnation of paper material such as paper, paper pulp, board, fiber or similar compositions with mixtures of sulphur and chlorodiphenyls, in which large quantities of the chlorodiphenyls are employed. In accord ance with this invention, I preferably employ a mixture containing from 15 to 80% chlorodiphenyl, the remainder being sulphur or chiefly sulphur. This mixture possesses advantages which are possessed by neither of the substances when used alone and which do not inhere in the product of the patent.-

A wide number of substances come under the class of chlorodiphenyls differing from Application filed September 3, 1930. Serial No. 479,583; i

combustion. When substantial percentages Their hoinologues are also inclu ded as for instance dinaphthyls. In general I prefer to; employ the. more completely halogenated. products because of their greater resistance to I phur as when the chlorodiphenyll exceeds" fifteen percent of the mass, the'fireretarding effect becomes valuable,and as the quantities are increased, the inflammability decreases until the product becomes fire-proof when it comprises about sixty five-percent of the mass.

The chlorinated two-cyclic diphenyl is softer and more fluid, also attimes crystalline, whereas the chlorinated higher diphenyls are harder,.non-crystalline, resinous and tough. A, desirable compound for impregnation,

therefore, may be formed by including about I 60 to of the chlorinated two-cyclic diphenyl and 20 to 40% of the chlorinated high er diphenyls. The larger the proportion of r chlorinated diphenyls in the impregnating bath, the moreimportant it is to have present the tough, resinous chlorinated higher diphenyls;

In forming a suitable impregnating compound, therefore, I may take 35-parts of sulphur' and 65 parts of ohlorodiphenyls of about the proportions outlined above. The

paper material'may beTimpregnated by dip ping into the molten'bath either with or'without the application of pressure or vacuum until the pores are completely filled. This results in'a hard, resistant, impervious, fire- I A i proof substance. 7

If it is desired only to, impregnate the outer lay-eror to make a surface coating upon the product, the mixture may be applied externally as vfor instance by spraying or brushing, either in a. molten, plastic or powdered state. Then the article may be gently heated until the mixture is absorbedinto the surface. By reason of the high content ,of

chlorodiphenyls the mixture will not support ,5 V 9 combustion.

Dye stuffs may be readily introduced into the mixture through the medium of the chlorodiphenyls, in; which many dyes are soluble and in this wayf'a' Wide variety of pleasing'eifects may be obtained.

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It'will be understood that Whereas chlorine and chlorine substitution has been referred td in the foregoing and in the claims, that Y inaterml impie htd iniXttire i forf'many purposesthe corresponding bro-Q 5' minated or othegwise halegenatedproducts V vmay be'emplayd Within thefscope "ofthis in? *ventioni 1 7 Since certain modifications in the compesition which m dy. th nv n ion; may 1 lj w i iwn i Fa i iQfr fiiiits'i ii 'i intfid'd tHa't" all maittef contained in the above description shall be interpreted asgil e lustrativeiand not in a'limiting sense.

.. 7 It is also to-be understZiddihaV-the 014 lowing-niaims are intended to V I V .n

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